An interesting offshoot of this type of question is: how long does it take to hit every stop on a given transit system? BART has quite a few people making attempts; the official BART website even maintains a little article [1]! A couple have made videos of attempts and theory [2, 3], but the king of these things is tomo tawa linja, who I believe is the current record holder at 5:30:26 [4].
0: https://en.wikipedia.org/wiki/Subway_Challenge